Gas holdup and solids dispersion in a three-phase slurry bubble column

Journal Article · Thu Nov 01 00:00:00 EST 1990 · A.I.Ch.E. Journal (American Institute of Chemical Engineers); (United States)

DOI:https://doi.org/10.1002/aic.690361114· OSTI ID:5726446

Bukur, D B; Patel, S A; Daly, J G ^[1]

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1. Kinetics, Catalysis and Reaction Engineering Lab., Dept. of Chemical Engineering, Texas A and M Univ., College Station, TX (US)

Studies with three-phase systems in bubble columns have shown that the effect of solids on gas holdup depends on a variety of factors. Important among these are: liquid properties and particle properties such as density, size and concentration in the slurry, and wettability. Most of these studies have been made with cold flow systems; and the data at high temperatures and pressures, i.e., with systems of potential industrial importance, are rare. The objective of this paper is to obtain hydrodynamic data at elevated temperatures using a three-phase system of importance to FTS. In particular, the effects of solids type, size and concentration on gas holdup and axial solids dispersion were investigated. Two types of solids used, iron oxide and silica, simulate typical catalysts and supports, respectively, employed in FTS. A wider range of gas velocities (up to 0.12 m/s) than those used by Deckwer et al, ({lt}0.04 m/s) was employed in this study. Additionally, data were obtained from experiments conducted with slurry circulation (continuous mode of operation), whereas all the previous studies with molten waxes were conducted in the batch mode of operation (without liquid flow).

• OSTI ID: 5726446
• Journal Information: A.I.Ch.E. Journal (American Institute of Chemical Engineers); (United States), Vol. 36:11; ISSN 0001-1541
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
01 COAL, LIGNITE, AND PEAT
37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
DISPERSIONS
FLUID FLOW
MOBIL PROCESS
PHASE STUDIES
FISCHER-TROPSCH SYNTHESIS
HYDRODYNAMICS
SLURRIES
LIQUIDS
DENSITY
SOLIDS
WETTABILITY
BUBBLES
CATALYSTS
DATA ANALYSIS
FISCHER-TROPSCH
FLOW MODELS
IRON OXIDES
PARTICLE SIZE
SILICA
TEMPERATURE RANGE 0065-0273 K
TEMPERATURE RANGE 0400-1000 K
CHALCOGENIDES
CHEMICAL REACTIONS
FLUID MECHANICS
FLUIDS
IRON COMPOUNDS
MATHEMATICAL MODELS
MECHANICS
MINERALS
MIXTURES
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
SILICON COMPOUNDS
SILICON OXIDES
SIZE
SUSPENSIONS
TEMPERATURE RANGE
TRANSITION ELEMENT COMPOUNDS
420400* - Engineering- Heat Transfer & Fluid Flow
010408 - Coal
Lignite
& Peat- C1 Processes- (1987-)
400201 - Chemical & Physicochemical Properties
400105 - Separation Procedures